CN1674463A - Apparatus and method for transmitting and receiving data in multiuser mimo system - Google Patents
Apparatus and method for transmitting and receiving data in multiuser mimo system Download PDFInfo
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- CN1674463A CN1674463A CN 200510071678 CN200510071678A CN1674463A CN 1674463 A CN1674463 A CN 1674463A CN 200510071678 CN200510071678 CN 200510071678 CN 200510071678 A CN200510071678 A CN 200510071678A CN 1674463 A CN1674463 A CN 1674463A
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- base station
- antenna
- reception programme
- scheme
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0621—Feedback content
- H04B7/0632—Channel quality parameters, e.g. channel quality indicator [CQI]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
- H04B7/0452—Multi-user MIMO systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
- H04B7/0842—Weighted combining
- H04B7/0848—Joint weighting
- H04B7/0854—Joint weighting using error minimizing algorithms, e.g. minimum mean squared error [MMSE], "cross-correlation" or matrix inversion
Abstract
A method for transmitting and receiving data in a multiuser Multiple-Input Multiple-Output (MIMO) system including a base station connected to a plurality of user equipments. In the method, each of the user equipments separately calculates channel capacity information using a linear reception scheme and a nonlinear reception scheme, and feeds back the calculated channel capacity information to the base station. The base station separately calculates system capacities using at least two different antenna scheduling schemes based on the channel capacity information fed back from the user equipments, and allocates antennas to the user equipments using a selected antenna scheduling scheme having higher system capacity out of the two antenna scheduling schemes.
Description
Technical field
The present invention relates generally to a kind of device and method that in multi-user's multiple-input and multiple-output (MIMO) system, is used to transmit and receive data, particularly, relate to and be used to the apparatus and method that transmit and receive data in multi-user MIMO system, the base station is selected the antenna scheduling scheme adaptively in this mimo system.
Background technology
Existing mobile radio system provides towards the professional of speech and mainly relies on chnnel coding to overcome the low-quality channel.Yet, because to the no matter increase of when and where ground and the high-quality multimedia service demand that anyone communicates of user, existing business develops into data-oriented business.Therefore, there are high needs to being used for the wireless transmission technology of future generation of lower error rate transmission mass data.Particularly, it is very important sending data with two-forty in the very big link of desired data amount.
For next generation wireless communication, various antenna systems have been recommended.For example, mimo system, that is, a typical antenna system is not excessively increasing spectrum efficiency by all transmitting antennas under the situation of service band width.Generally, according to the transmission structure and the scheme of transmitter, MIMO is classified into space-time coding (STC), diversity, wave beam forms (BF), and spatial multiplexing (SM), and all these all provide high data rate and reliability.
When various antenna systems are used to transmitting terminal or receiving terminal, play greatest factor during the power system capacity of scheduling scheme in determining the multiuser MIMO environment, transmitting antennas different in this multiuser MIMO environment can be divided the transfer of data that is used in the specific user simultaneously.Because the send/receive antenna that cellular network trends towards using number to increase is served the user that number increases, so dispatching algorithm plays an important role in the system schema of complexity.
User's transmitting antenna scheduling scheme comprises various resources (that is transmitting antenna) allocative decision.For example, all transmitting antennas are assigned to a user, or according to the link condition between transmitting antenna and reception antenna, distribute transmitting antenna to give different users.
Receiving terminal is implemented with SIC, ball decoding and the Maxium likelihood estimation method of linear ZF (ZF), least mean-square error (MMSE), Successive Interference Cancellation (SIC), rule, and the improvement of those schemes on performance simultaneously increased the complexity of implementing undesirably.
Therefore, in wireless communication system, determine best power system capacity according to the type of mimo system, the type of scheduling scheme and the implementation method of receiving terminal.Therefore, its enforcement can realize in a different manner according to the purpose of this system.
Summary of the invention
The present invention implements a kind of antenna scheduling scheme adaptively according to receiving terminal structure in the multi-user MIMO system and number of users.
The present invention implements a kind of antenna scheduling scheme adaptively according to the number of users of the receiving terminal that has linear and nonlinear characteristic in the multi-user MIMO system.
According to an aspect of the present invention, provide a kind of method that in comprising multi-user's multiple-input and multiple-output (MIMO) system of the base station that is connected to a plurality of subscriber equipmenies, is used to transmit and receive data.In the method, each subscriber equipment uses linear reception programme and non-linear reception programme calculating channel capacity information respectively, and with the channel capacity feedback information calculated to the base station.The base station is according to this channel capacity information from the subscriber equipment feedback, use at least two different antenna scheduling computation schemes power system capacities respectively, and use the antenna scheduling scheme of selecting in the middle of two antenna scheduling schemes to be the user equipment allocation antenna with higher power system capacity.
According to a further aspect in the invention, provide a kind of method that is used to transmit and receive data in multi-user's multiple-input and multiple-output (MIMO) system, wherein, antenna is distributed according to the channel condition information that the terminal from the coverage that is positioned at it receives in the base station.The method comprising the steps of: according to the channel condition information that receives from all terminals, use at least two reception programmes to calculate total system capacity; In reception programme, select to have the reception programme of higher total system capacity; Use with the corresponding transmitting antenna allocative decision of the reception programme of selecting and distribute antenna.
Description of drawings
Above-mentioned and other purpose of the present invention, characteristics and advantage will become clearer owing to following detailed description with the accompanying drawing, wherein:
Fig. 1 is a block diagram, and the device that transmits and receive data in multi-user MIMO system according to an embodiment of the invention is shown;
Fig. 2 is a signaling transmission diagram, and the method that transmits and receive data in multi-user MIMO system according to an embodiment of the invention is shown; With
Fig. 3 is a chart, and the relation between power system capacity and the antenna scheduling scheme is shown.
Embodiment
Describe the preferred embodiments of the present invention hereinafter in detail now with reference to accompanying drawing.In the following description, the detailed description of included known function and structure is here omitted for the sake of simplicity.
Fig. 1 is a block diagram, and the device that transmits and receive data of being used in multi-user MIMO system according to an embodiment of the invention is shown.As shown in fig. 1, in multi-user MIMO system, each sub-district comprises a base station 10 and a plurality of subscriber equipment (or terminal) UE
1To UE
k
Each user equipment (UE)
1To UE
kComprise a plurality of antennas 25 and 26, and use SIC 21 with nonlinear characteristic and 22 and MMSE 23 and 24 with linear characteristic.Therefore, when from the base station 10 when receiving signal, each user equipment (UE)
1To UE
kCalculate respectively and be used for SIC scheme 21 and 22 and the channel capacity of MMSE scheme 23 and 24, and with corresponding information feedback to base station 10.If base station 10 usefulness MLT schemes distribute transmitting antenna ANT# 1 to ANT#N, each user equipment (UE)
1To UE
kReceive data with SIC scheme 21 and 22.If base station 10 usefulness IST schemes distribute transmitting antenna ANT# 1 to ANT#N, each user equipment (UE)
1To UE
kReceive data with MMSE scheme 23 and 24.
Therefore, according to from user equipment (UE)
1To UE
k Feedback information 12 select to be used for the scheduling scheme of transmitting antenna ANT#1 to ANT#N.Yet, be connected to the user equipment (UE) of base station 10
1To UE
kNumber may be because of user equipment (UE)
1To UE
kMove and change.Therefore, base station 10 uses control signal (for example, pilot signal) from user equipment (UE)
1To UE
kReceiving feedback information 12 continuously, and this control signal allows user equipment (UE)
1To UE
kCalculate their channel capacity information continuously and with the channel capacity feedback information calculated to the base station 10.Further, the base station is according to the feedback information 12 real-time monitoring system capacity that receive, and according to monitoring that the result selects the antenna scheduling scheme adaptively.For example, a subscriber equipment, it connects the antenna of base station 10 and uses the executive communication of SIC reception programme with the MLT scheme at present, owing to be connected to the user device quantity purpose change of base station 10, this subscriber equipment can be connected to the antenna of base station 10 and use the executive communication of MMSE reception programme with the IST scheme subsequently.
Fig. 2 is a signaling transmission diagram, and the method that transmits and receive data of being used in multi-user MIMO system according to an embodiment of the invention is shown.With reference to Fig. 2, at step S2, in order to be identified for the antenna scheduling scheme of transfer of data, the base station sends a control signal to subscriber equipment, and this control signal makes this subscriber equipment calculate their channel capacity information continuously and gives the base station with the channel capacity feedback information of calculating.
At step S4, each subscriber equipment uses SIC scheme and MMSE scheme to receive control signal, and according to control signal calculating channel capacity.Here, the signal to noise ratio (snr) of the channel of setting up from m transmitting antenna to k subscriber equipment is represented as γ
K, m, the channel capacity of using this snr value to calculate is represented as c
f(γ
K, m(t)).
At step S6, the channel capacity information c that subscriber equipment will calculate with SIC reception programme and MMSE reception programme
f(γ
K, m(t)) feed back to the base station.
At step S8, the base station determines that it will use the MLT scheme still is IST scheme scheduling antenna.Therefore, use from scheme that is suitable for maximized system capacity of channel capacity Information Selection of subscriber equipment feedback the base station.
When using MLT scheme scheduling antenna, k subscriber equipment of base station search, the capacity summation that wherein is used for all m transmitting antenna is maximized.When using MLT scheme scheduling antenna, power system capacity can be represented by equation (1).
When using IST scheme scheduling antenna, the capacity of each transmitting antenna should be maximized.That is to say that when using IST scheme scheduling antenna, power system capacity equates with the summation of the capacity of each transmitting antenna, represents as equation (2).
At step S10, calculating C
M(t) and C
I(t) afterwards, the base station is from C
M(t) value and C
I(t) select a higher value in the value, use corresponding to the scheme of this selective value and give the user equipment allocation antenna, and data are sent to subscriber equipment, represent as equation (3).
C
H(t)＝max{C
M(t)，C
I(t)}………(3)
All said process are periodically carried out between base station and subscriber equipment.Therefore, this base station can be tackled the user device quantity purpose variation that is connected to this base station on one's own initiative.
Fig. 3 is a chart, and the relation between power system capacity and the antenna scheduling scheme is shown.Go out as shown, power system capacity increases and increases along with the user device quantity purpose, and is irrelevant with the type of scheduling scheme.Yet, if subscriber equipment outnumber a predetermined value, the MLT scheme is better than the IST scheme with regard to power system capacity.
In a word, in the present invention, the base station is surveillance capacity and change according to the user device quantity purpose and to select the optimal antenna scheduling scheme adaptively periodically.
As mentioned above, the present invention is at comparison system capacity with linear MMSE reception programme and the system that realizes with IST antenna scheduling scheme and between with the system of non-linear SIC reception programme and the realization of MLT antenna scheduling scheme, and select to have the antenna scheduling scheme of higher power system capacity according to comparative result, provide thus one can be in real time according to the multi-user MIMO system of the number realization optimizer system capacity of the subscriber equipment that is connected to the base station.
Though the present invention is illustrated and describes with reference to its some preferred embodiment, but it will be appreciated by those skilled in the art that, under situation about not deviating from, can make different variations in form and details as the appended defined the spirit and scope of the invention of claim.
Claims (25)
1. device that in multi-user's multiple-input and multiple-output mimo system, is used to transmit and receive data, this device comprises:
A plurality of subscriber equipmenies are used for using respectively linear reception programme and non-linear reception programme calculating channel capacity information, and feed back this channel capacity information; With
The base station, be used to receive channel capacity information from the subscriber equipment feedback, use at least two different antenna scheduling computation schemes power system capacities respectively according to channel capacity information, and use the antenna scheduling scheme of from least two antenna scheduling schemes, selecting to give subscriber equipment antenna assignment with higher power system capacity.
2. device as claimed in claim 1, wherein these at least two different antenna scheduling schemes comprise the maximum link methodology MLT scheme that is used for all transmitting antennas of base station are assigned to a subscriber equipment, with the independent flux method IST scheme that is used for the transmitting antenna of base station is assigned to different subscriber equipmenies.
3. device as claimed in claim 2, wherein when corresponding user equipment uses the MLT scheme to be connected to the base station, each subscriber equipment uses non-linear reception programme to receive data, and when corresponding user equipment used the IST scheme to be connected to the base station, each subscriber equipment used linear reception programme to receive data.
4. device as claimed in claim 3, wherein non-linear reception programme are continuous interference eliminated SIC reception programmes.
5. device as claimed in claim 3, its neutral line reception programme are least mean-square error MMSE schemes.
6. device as claimed in claim 1, wherein the base station is from subscriber equipment receive channel capacity information periodically, and reselects in two antenna scheduling schemes one according to the channel capacity information that periodically receives.
7 one kinds of methods that in comprising multi-user's multiple-input and multiple-output mimo system of the base station that is connected to a plurality of subscriber equipmenies, are used to transmit and receive data, the method comprising the steps of:
Use linear reception programme and non-linear reception programme calculating channel capacity information respectively by subscriber equipment;
Give the base station with the channel capacity feedback information of calculating;
By the base station,, use at least two different antenna scheduling computation schemes power system capacities respectively according to channel capacity information from the subscriber equipment feedback; And
The antenna scheduling scheme that use is selected from least two antenna scheduling schemes with higher power system capacity with antenna assignment to subscriber equipment.
8. method as claimed in claim 7, wherein these at least two different antenna scheduling schemes comprise the maximum link methodology MLT scheme that is used for all transmitting antennas of base station are distributed to a subscriber equipment, with the independent flux method IST scheme that is used for the transmitting antenna of base station is assigned to different subscriber equipmenies.
9. method as claimed in claim 8, wherein when corresponding user equipment uses the MLT scheme to be connected to the base station, each subscriber equipment uses non-linear reception programme to receive data, and when corresponding user equipment used the IST scheme to be connected to the base station, each subscriber equipment used linear reception programme to receive data.
10. method as claimed in claim 9, wherein non-linear reception programme are continuous interference eliminated SIC reception programmes.
11. method as claimed in claim 9, its neutral line reception programme are least mean-square error MMSE schemes.
12. method as claimed in claim 7, wherein the base station is from subscriber equipment receive channel capacity information and according at least two antenna scheduling schemes of channel capacity Information Selection periodically.
13. a method that is used to transmit and receive data in multi-user's multiple-input and multiple-output mimo system, wherein antenna is distributed according to the channel condition information that receives from the terminal that is positioned within the base station overlay area in the base station, and the method comprising the steps of:
Use at least two reception programmes to calculate total power system capacity according to the channel condition information that receives from all terminals;
Among reception programme, select to have the reception programme of higher total system capacity; And
Use distributes antenna corresponding to the transmitting antenna allocative decision of selected reception programme.
14. method as claimed in claim 13, wherein this reception programme comprises linear reception programme and non-linear reception programme.
15. method as claimed in claim 14, wherein when the reception programme of selecting was linear reception programme, the base station used the individual antenna allocative decision to distribute transmitting antenna.
16. method as claimed in claim 14, wherein when the reception programme of selecting was non-linear reception programme, the base station was used and is concentrated the antenna assignment scheme to distribute transmitting antenna.
17. method as claimed in claim 14, wherein when the reception programme of selecting is linear reception programme, the base station uses the individual antenna allocative decision to distribute transmitting antenna, and when the reception programme of selecting was non-linear reception programme, the base station was used and concentrated the antenna assignment scheme to distribute transmitting antenna.
18. method as claimed in claim 17, wherein the individual antenna allocative decision is distributed transmitting antenna on the basis that distributes, so that the power system capacity of each terminal is maximized.
19. method as claimed in claim 17 wherein concentrates the antenna assignment scheme that all transmitting antennas are assigned to a terminal.
20. method as claimed in claim 17, wherein the individual antenna allocative decision is that independent flux method IST scheme and concentrated antenna assignment scheme are maximum link methodology MLT schemes.
21. method as claimed in claim 17, its neutral line reception programme are least mean-square error MMSE schemes.
22. method as claimed in claim 17, wherein non-linear reception programme are continuous interference eliminated SIC schemes.
23. method as claimed in claim 13, wherein the transmitting antenna allocative decision comprises MLT scheme and IST scheme.
24. method as claimed in claim 14, its neutral line reception programme are least mean-square error MMSE schemes.
25. method as claimed in claim 14, wherein non-linear reception programme are continuous interference eliminated SIC schemes.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US54542204P | 2004-02-17 | 2004-02-17 | |
| US60/545,422 | 2004-02-17 | ||
| KR1020050000818A KR100678167B1 (en) | 2004-02-17 | 2005-01-05 | Apparatus and method for transmitting and receiving data in multiuser multiple-input multiple-out system |
| KR818/2005 | 2005-01-05 | ||
| KR818/05 | 2005-01-05 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1674463A true CN1674463A (en) | 2005-09-28 |
| CN100479346C CN100479346C (en) | 2009-04-15 |
Family
ID=34703466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200510071678XA Expired - Fee Related CN100479346C (en) | 2004-02-17 | 2005-02-17 | Apparatus and method for transmitting and receiving data in multiuser mimo system |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1564906B1 (en) |
| JP (1) | JP4319633B2 (en) |
| CN (1) | CN100479346C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101047417B (en) * | 2007-04-20 | 2010-06-09 | 哈尔滨工程大学 | Selection preprocess method for downlink link antenna of multi-user MIMO system |
| CN102239649A (en) * | 2008-12-02 | 2011-11-09 | Lg电子株式会社 | Method for transmitting reference signals in a downlink multiple input multiple output system |
| WO2012151875A1 (en) * | 2011-05-12 | 2012-11-15 | 新邮通信设备有限公司 | Method for configuring antenna port |
| CN103377138A (en) * | 2012-04-25 | 2013-10-30 | 马维尔国际有限公司 | Memory device and method for adaptive SIC demodulation |
| CN105634664A (en) * | 2014-11-07 | 2016-06-01 | 中兴通讯股份有限公司 | Decoding method and device at downlink non-orthogonal multiple access |
| CN106341166A (en) * | 2015-07-09 | 2017-01-18 | 合勤科技股份有限公司 | Multi-user multi-input multi-output base station and communication method thereof |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060096365A (en) * | 2005-03-04 | 2006-09-11 | 삼성전자주식회사 | User scheduling method for multiuser mimo communication system |
| US10020858B2 (en) | 2006-03-03 | 2018-07-10 | Nec Corporation | Multi-input multi-output communication system, transmitter, and method of assigning resources therein |
| US8111782B2 (en) | 2006-08-31 | 2012-02-07 | Samsung Electronics Co., Ltd. | Apparatus and method for transmitting/receiving data in a multi-antenna system, and system using the same |
| JP4594361B2 (en) * | 2006-08-31 | 2010-12-08 | 三星電子株式会社 | Data transmitting / receiving apparatus and method in multi-antenna system and system supporting the same |
| US7929625B2 (en) | 2007-09-20 | 2011-04-19 | Telefonaktiebolaget Lm Ericsson (Publ) | Quality of service based antenna mapping for multiple-input multiple-output communication systems |
| CN101207590B (en) * | 2007-12-07 | 2011-05-11 | 华中科技大学 | Method and system of MIMO transmission |
| JP5060425B2 (en) * | 2008-08-20 | 2012-10-31 | 株式会社東芝 | Wireless transmission device |
| KR101777424B1 (en) | 2011-01-19 | 2017-09-12 | 엘지전자 주식회사 | Method and apparatus for receiving signal in multi-node system |
| CN102264147B (en) * | 2011-08-26 | 2014-05-07 | 东南大学 | Statistical channel information assisted downlink multiuser proportional fair scheduling methods |
| CN102315914B (en) * | 2011-09-01 | 2014-04-30 | 上海交通大学 | Robust non-linear transceiver under multiple-input-multiple-output spatial correlation channel |
| KR101953244B1 (en) | 2012-04-26 | 2019-02-28 | 삼성전자주식회사 | Method and apparatus for user scheduling in the multi user mimo communication system |
| CN113826328A (en) * | 2019-04-29 | 2021-12-21 | 艾斯康实验室公司 | User equipment selection |
| US10686502B1 (en) | 2019-04-29 | 2020-06-16 | XCOM Labs, Inc. | Downlink user equipment selection |
| CN115481521A (en) * | 2021-05-31 | 2022-12-16 | 深圳市中兴微电子技术有限公司 | Multi-user multi-input multi-output detection method and device, electronic equipment and medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6785341B2 (en) * | 2001-05-11 | 2004-08-31 | Qualcomm Incorporated | Method and apparatus for processing data in a multiple-input multiple-output (MIMO) communication system utilizing channel state information |
| US20030125040A1 (en) * | 2001-11-06 | 2003-07-03 | Walton Jay R. | Multiple-access multiple-input multiple-output (MIMO) communication system |
| US7020110B2 (en) * | 2002-01-08 | 2006-03-28 | Qualcomm Incorporated | Resource allocation for MIMO-OFDM communication systems |
-
2005
- 2005-02-17 EP EP05003423.0A patent/EP1564906B1/en not_active Expired - Fee Related
- 2005-02-17 CN CNB200510071678XA patent/CN100479346C/en not_active Expired - Fee Related
- 2005-02-17 JP JP2005041069A patent/JP4319633B2/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101047417B (en) * | 2007-04-20 | 2010-06-09 | 哈尔滨工程大学 | Selection preprocess method for downlink link antenna of multi-user MIMO system |
| CN102239649A (en) * | 2008-12-02 | 2011-11-09 | Lg电子株式会社 | Method for transmitting reference signals in a downlink multiple input multiple output system |
| US8619693B2 (en) | 2008-12-02 | 2013-12-31 | Lg Electronics Inc. | Method for transmitting reference signals in a downlink multiple input multiple output system |
| CN102239649B (en) * | 2008-12-02 | 2014-03-19 | Lg电子株式会社 | Method for transmitting reference signals in a downlink multiple input multiple output system |
| US8913581B2 (en) | 2008-12-02 | 2014-12-16 | Lg Electronics Inc. | Method for transmitting reference signals in a downlink multiple input multiple output system |
| US9276692B2 (en) | 2008-12-02 | 2016-03-01 | Lg Electronics, Inc. | Method for transmitting reference signals in a downlink multiple input multiple output system |
| US9954593B2 (en) | 2008-12-02 | 2018-04-24 | Lg Electronics Inc. | Method for transmitting reference signals in a downlink multiple input multiple output system |
| WO2012151875A1 (en) * | 2011-05-12 | 2012-11-15 | 新邮通信设备有限公司 | Method for configuring antenna port |
| CN103377138A (en) * | 2012-04-25 | 2013-10-30 | 马维尔国际有限公司 | Memory device and method for adaptive SIC demodulation |
| CN103377138B (en) * | 2012-04-25 | 2018-02-27 | 马维尔国际有限公司 | Storage device and method for adaptive SIC demodulation |
| CN105634664A (en) * | 2014-11-07 | 2016-06-01 | 中兴通讯股份有限公司 | Decoding method and device at downlink non-orthogonal multiple access |
| CN106341166A (en) * | 2015-07-09 | 2017-01-18 | 合勤科技股份有限公司 | Multi-user multi-input multi-output base station and communication method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2005237006A (en) | 2005-09-02 |
| CN100479346C (en) | 2009-04-15 |
| EP1564906A3 (en) | 2012-04-04 |
| EP1564906A2 (en) | 2005-08-17 |
| JP4319633B2 (en) | 2009-08-26 |
| EP1564906B1 (en) | 2016-05-25 |
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